Commit 5dcbf248 authored by unknown's avatar unknown
Browse files

A fix. (Bug #3376: AVG(constant) returns constant if no rows in result set)

parent a5d016ec

mysql-test/r/func_group.result

+5 −0
Original line number Diff line number Diff line
@@ -256,3 +256,8 @@ bit_and(col) bit_or(col) 
18446744073709551614	18446744073709551614

18446744073709551615	18446744073709551615

drop table t1;

create table t1 (a int);

select avg(2) from t1;

avg(2)

NULL

drop table t1;

mysql-test/t/func_group.test

+8 −0
Original line number Diff line number Diff line
@@ -155,3 +155,11 @@ insert into t1 values (-1), (-2), (-3); 
select bit_and(col), bit_or(col) from t1;

select SQL_BIG_RESULT bit_and(col), bit_or(col) from t1 group by col;

drop table t1;



#

# Bug #3376: avg() and an empty table

#



create table t1 (a int);

select avg(2) from t1;

drop table t1;

sql/item_sum.h

+1 −0
Original line number Diff line number Diff line
@@ -249,6 +249,7 @@ class Item_sum_avg :public Item_sum_num 
  void update_field();

  Item *result_item(Field *field)

  { return new Item_avg_field(this); }

  void no_rows_in_result() {}

  const char *func_name() const { return "avg"; }

  unsigned int size_of() { return sizeof(*this);}  

};